Calcium reactor. to count drip rate or not??

Discussion in 'Reef Chemistry by Randy Holmes-Farley' started by d_adler, Mar 6, 2018.

  1. Velcro

    Velcro Valuable Member

    Joined:
    Feb 7, 2016
    Messages:
    2,722
    Likes Received:
    2,416
    Location:
    Kalamazoo, MI
    Just switched to this method. Been trying to tune my mj1200 fed reactor for a week an drip rate was just going between 40-60 drops a minute with no adjustment to the needle valve. Hopefully this works better for me or I may need to look into a variable speed peristaltic pump.
     
    d_adler and bubbaque like this.

  2. Mike220

    Mike220 Active Member

    Joined:
    Jan 17, 2017
    Messages:
    147
    Likes Received:
    39
    For me I set drop 40 ml per minute and 2 to 3 bubble per seconds .
     
  3. bigboy7828

    bigboy7828 Member

    Joined:
    Oct 18, 2013
    Messages:
    62
    Likes Received:
    11
    Location:
    Moorpark, CA
    I use this method also. 80ml per minute on the effluent. Not sure on my bubbles. I adjust my ph in my reactor to control my dkh. Has worked good for me now for over a year. In my opinion it’s the easiest way to run a cal reactor.
     
    d_adler likes this.
  4. vic5hands

    vic5hands Well-Known Member

    Joined:
    Mar 14, 2013
    Messages:
    694
    Likes Received:
    1,737
    Location:
    New York
    I have my range set on my Apex 6.4 To 6.6 I check my calcium level at my effluent cup . This is how I set my drip
     
  5. d_adler

    d_adler Active Member

    Joined:
    Sep 7, 2014
    Messages:
    403
    Likes Received:
    94
    Location:
    south floirda
    I don’t know how fast it is as of now. I’m gonna get a measuring cup to measure this weekend. What I do know is it takes about 10 minutes to go from 7.4-7.5 which is my set points. The Regulator is cycling about 6 times an hour. [​IMG]
     
  6. d_adler

    d_adler Active Member

    Joined:
    Sep 7, 2014
    Messages:
    403
    Likes Received:
    94
    Location:
    south floirda
    Is 80ml enough to make a steady stream?
     
  7. vic5hands

    vic5hands Well-Known Member

    Joined:
    Mar 14, 2013
    Messages:
    694
    Likes Received:
    1,737
    Location:
    New York
    IMG_1922.JPG
     
  8. cnmcalpi

    cnmcalpi Member

    Joined:
    Feb 10, 2017
    Messages:
    26
    Likes Received:
    19
    Location:
    Denver, NC
    Randy,

    Could you build a c02 degasser with a small container that you run the CaRx effluent into and drive off c02 with an airstone? Maybe a gallon or so, and allow this effluent to overflow into the tank?
     
  9. Caravanshaka

    Caravanshaka Active Member R2R Supporter Build Thread Contributor

    Joined:
    Oct 23, 2017
    Messages:
    475
    Likes Received:
    709
    Location:
    Austin, TX
    I would suggest lowering the bubble size by reducing the pressure going into the solenoid. I'm at 5 PSI for bubble size, a bubble every 8-9 seconds with 20 mL per minute effluent rate (masterflex peristaltic pump) and my reactor stays a stead 7.0 pH.

    Another tip to help with the reduction of cO2 getting into the tank is to have your effluent return back to your refugium. The algae in the refugium will like getting a little more cO2 and will help purge it from the system.
     
  10. cumbeje

    cumbeje Active Member R2R Supporter Build Thread Contributor

    Joined:
    May 23, 2014
    Messages:
    393
    Likes Received:
    334
    I don't count drip rate. It is much easier to use a graduated cylinder and measure effluent over a specific period of time. For example I use 2o mls of effluent in 10 seconds. Much more stable to do this way.
     
    boozeman27 likes this.
  11. Randy Holmes-Farley

    Randy Holmes-Farley Reef Chemist Staff Member Team R2R R2R Supporter R2R Excellence Award Article Contributor Expert Contributor

    Joined:
    Sep 5, 2014
    Messages:
    31,185
    Likes Received:
    18,771
    Location:
    Arlington, Massachusetts, United States
    Yes, some folks do that and it is useful. :)

    Just have to make sure the rising pH in the high alk solution does not cause precipitation, reversing the whole reactor process. :)
     
  12. Mike220

    Mike220 Active Member

    Joined:
    Jan 17, 2017
    Messages:
    147
    Likes Received:
    39
    You need to set PH 6.6 is on and 6.5 is off.
     
  13. cnmcalpi

    cnmcalpi Member

    Joined:
    Feb 10, 2017
    Messages:
    26
    Likes Received:
    19
    Location:
    Denver, NC
    So basically, you'd have to control the "dwell time" of the solution being aerated, as to not push the ph so far as to precipitate the supersaturated solution? This could be done either by controlling the air injection rate or the size of the container, I suppose.
     
  14. Caravanshaka

    Caravanshaka Active Member R2R Supporter Build Thread Contributor

    Joined:
    Oct 23, 2017
    Messages:
    475
    Likes Received:
    709
    Location:
    Austin, TX
    Please don't tell someone to reduce their pH in their reactor by 1.0 like it is a fact. A change like that to his system is a likely to cause a tank crash. The OP clearly stated he wants to use the method of a steady stream of effluent and adjust the reactor by adjusting the pH. With a steady stream of effluent and 6.5 to 6.6 pH, he will melt that media so fast his alk will be climbing by the minute.

    While you may be running 40mL per minute at a reactor pH of 6.5, that doesn't mean he should be. 40 mL per minute isn't what I would consider a steady stream, as most that are running their reactors by pH tend to be running 80-100mL per minute.

    Starting out with a calcium reactor, this approach is a bit easier as they only have to adjust one of the variables to adjust their results. starting out at a high pH is definitely good, as you can always buffer with 2-part to raise your numbers if your reactor didn't put enough in that day at the conservative pH. Add your 2-part to get back to steady numbers, and lower your pH a bit and test again the next day until you find the pH that keeps up with your tanks output. It may not be the most efficient use of cO2, but it works.

    His question was related to how to get his cO2 delivery setup to handle the 7.4pH he is attempting to use. The answer he is looking for is to drop the pressure at the solenoid down to 3-4psi. This should get him in the range of a bubble every 5-10 seconds and keeping that high of a pH.
     
    d_adler likes this.
  15. Mike220

    Mike220 Active Member

    Joined:
    Jan 17, 2017
    Messages:
    147
    Likes Received:
    39
    That PH do nothing on calcium reactor.
     
  16. Randy Holmes-Farley

    Randy Holmes-Farley Reef Chemist Staff Member Team R2R R2R Supporter R2R Excellence Award Article Contributor Expert Contributor

    Joined:
    Sep 5, 2014
    Messages:
    31,185
    Likes Received:
    18,771
    Location:
    Arlington, Massachusetts, United States
    Yes, trial and error will be the only way to know what works and what might be too much degassing.
     
    cnmcalpi likes this.
  17. d_adler

    d_adler Active Member

    Joined:
    Sep 7, 2014
    Messages:
    403
    Likes Received:
    94
    Location:
    south floirda
    Wow. *slow clap*

    Perfect answer. So it is ok to run a solenoid at 2-4psi.. I wasn’t aware they could run At such a low psi. I’m getting a graduated cylinder to measure my output this weekend.

    I understand that there are diehards that will say 6.5-6.7 is where you have to run a calcium reactor but that wouldn’t work for me. I don’t have such a high demand for alkalinity yet, I’m running the reactor off a manifold (potential for inconsistency in pressure), and I’m using an alternative method not the original method based off of drip count. I’d rather start at a high ph zone and gradually lower that “zone” based on the alkalinity of the tank. If my alkalinity lowers I can always raise it with a water change or by dosing 2 part until I dial in my calcium reactor. What I don’t want is my alkalinity to spike because I lower my ph to quickly.

    I appreciate your input.
     
    Caravanshaka likes this.
  18. Caravanshaka

    Caravanshaka Active Member R2R Supporter Build Thread Contributor

    Joined:
    Oct 23, 2017
    Messages:
    475
    Likes Received:
    709
    Location:
    Austin, TX
    It may not, but pH below 7.5 can slowly start to dissolve media. Even if it isn't working yet, it is safer to start at 7.4 and work slowly down than it is to jump to 6.5 with 80-100mL per minute effluent and crash your tank. You can't give 1 liner advice to someone new to something because they may take it as gospel and do it without thinking about the repercussions. If you want to suggest 6.5 in his situation, you must explain why and what you think it will be doing. At 6.5 pH with a tank new to a calcium reactor and likely not using up much alkalinity, the effluent rate would need to be in the 5-10ml range which defeats the whole point of his original post of wanting to run the effluent open and adjust the reactor via pH.

    OP, you are starting in a decent spot. Personally, I would drop the pH a tad and maybe do 7.2 to 7.3 to start with. There is a slight chance you overshoot your numbers with 80mL effluent at that range, but it is a very slight chance and most likely you will need to come down into the 7-7.2 range before seeing results.
     
    bubbaque and d_adler like this.
  19. Caravanshaka

    Caravanshaka Active Member R2R Supporter Build Thread Contributor

    Joined:
    Oct 23, 2017
    Messages:
    475
    Likes Received:
    709
    Location:
    Austin, TX
    I was replying to Mike and hadn't read this yet. I'm glad you have a good understanding of your goals. I run my pressure at 5psi, and don't see a problem with going a little lower. I probably wouldn't go any lower than 3, but 3-4 range should be just fine.
     
    d_adler likes this.
  20. Mike220

    Mike220 Active Member

    Joined:
    Jan 17, 2017
    Messages:
    147
    Likes Received:
    39
    Haha
    Your choice
     
Draft saved Draft deleted

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice
Loading...